Agree: 11% is a enviable conversion rate! Very impressed with this!! They were emailing Nk users and tweeting Nk more. So let's say you reached (Nk + Nk) + .25

Agree: 11% is a enviable conversion rate! Very impressed with this!! They were emailing Nk users and tweeting Nk more. So let's say you reached (Nk + Nk) + .25 users. Consider a response rate of .3 and you come up with a few thousand more users. Can your process handle a few thousand more? You can test for that. You can also calculate the cost of that increase overall to your company. Seems pretty straightforward.